Actron CP9087 Service Manual page 24

Section 2
Testing Sensors
Off-Car test: Slowly push sensor element back and forth
from end to end.
• Good Sensor - TEST light smoothly moves up or down as
sensor is operated. (The TEST light may go off if it moves
to the bottom of the column - this is O.K.) Range of TEST
light movement varies with sensor type and vehicle
mounting.
• Bad Sensor - TEST light position does not change during
test OR light movement is erratic, showing a sudden jump
or dip during smooth sensor operation.
10) Testing is complete.
Set RANGE switch to POWER OFF and remove all test
leads.
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